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Severity Rating: Critical
Revision Note: V1.2 (July 17, 2013): Added a link to Microsoft Knowledge Base Article 2722913 under Known Issues in the Executive Summary.
Summary: This security update resolves four privately reported vulnerabilities in Internet Explorer. The most severe vulnerabilities could allow remote code execution if a user views a specially crafted webpage using Internet Explorer. An attacker who successfully exploited any of these vulnerabilities could gain the same user rights as the current user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.